Neonatal intensive care units (NICUs) and medical intensive care units (MICUs) are both very expensive. The cost-effectiveness of NICUs has been extensively evaluated, as has the long-term outcomes of subpopulations of NICU patients. NICU treatment is among the most cost-effective of high-tech interventions. And most patients do well. There are fewer evaluations of cost-effectiveness in the MICU and almost no long-term outcome studies. Policymakers who scrutinize expensive high-tech interventions would do well to study the examples found in the NICU